Positivity is spreading throughout the Emirates. Two F.A. Cup successes in as many seasons, world class signings and a hugely talented squad have seen the club emerge from the shadows and are now tipped by many to finally challenge for the Premier League once again.
However, while this Arsenal squad may contain some of Europe's most talented players, there is a still an obvious loop hole in Wenger's system - a lack of a Plan B.
Francis Coquelin's renaissance has seemingly solved the ever present issue at the heart of Arsenal's defensive midfield.
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However, Wenger must look to strengthen that area further if he is to truly take Arsenal back to the top and challenge the best.
While defensive performances have no doubt improved this season, case in point the performance at the Ethiad, there still remain some fundamental issues.
The lack of defensive discipline apart from Coquelin is worrying at times and the Frenchmen is often left fighting battles on his own in the heart of midfield.
Another signing needed
The answer to me seems very obvious: Arsenal need a second defensive midfielder to give them the necessary protection when the time comes.
Chelsea last season often used Kurt Zouma as a second defensive option in midfield to nullify threatening attackers and suffocate teams in the middle of the park.
While this style may not be pleasing on the eye it is sometimes what is required in order to achieve success.
Wenger may have to go against his offensive philosophies in order to take Arsenal back to the pinnacle of English football.
Santi Cazorla, Aaron Ramsey and Jack Wilshere may be some of the most gifted footballers on the planet but their inept defensive qualities in big games can often prove costly.
Arsenal are not very far away from something special but a 'Plan B' is something the squad will need in order to achieve it.
Petr Cech may have finally solved the goalkeeping issue, now Wenger needs to look quickly to perhaps solve the final piece of the jigsaw.